[PATCH 2/2] tee: optee: don't enumerate services if there ain't any

[Tom Rini]

On Wed, Nov 29, 2023 at 01:37:53PM +0100, Etienne Carriere wrote:

> Change optee driver service enumeration to not enumerate (and
> allocate a zero sized shared memory buffer) when OP-TEE
> reports that there is no service to enumerate.
> 
> This change fixes an existing issue that occurs when the such zero
> sized shared memory buffer allocated from malloc() has a physical
> address of offset 0 of a physical 4kB page. In such case, OP-TEE
> secure world refuses to register the zero-sized shared memory
> area and makes U-Boot optee service enumeration to fail.
> 
> Fixes: 94ccfb78a4d6 ("drivers: tee: optee: discover OP-TEE services")
> Signed-off-by: Etienne Carriere <etienne.carriere at foss.st.com>
> Reviewed-by: Patrice Chotard <patrice.chotard at foss.st.com>
> Reviewed-by: Jens Wiklander <jens.wiklander at linaro.org>

Applied to u-boot/next, thanks!

-- 
Tom
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